Sure, it’s been 20 years since “Dumb and Dumber,” and we’d all prefer to forget the no-star 2003 sequel “Dumb and Dumberer,” but based on the trailer for “Dumb and Dumber To,” the reunited stars Jim Carrey and Jeff Daniels can still bring the funny.

Amateur catheter removal, a master of disguise who poses as a snack-vending machine and unspeakable behavior by a grandma are some reasons the new trailer (which debuted on Jimmy Fallon last night) is a must-see.